feat: 拆分 CLI 与网页宿主，并在无有效城市时暂停等人确认

将原单体 MAF1 拆成 MAF1（控制台工作流）和 MAF1.Web（可视化编排）。
抽城市失败时暂停：网页弹确认、CLI 控制台询问，超时采用默认结束查询；
也可改填城市后继续。共享决策模型放在 MAF1.Core。

MAF1.Web/Program.cs

@@ -0,0 +1,50 @@
+using MAF1.Decisions;
+using MAF1.Utils;
+using MAF1.Web;
+
+WindowsConsole.EnableUtf8();
+
+WebApplicationBuilder builder = WebApplication.CreateBuilder(args);
+builder.WebHost.UseUrls("http://127.0.0.1:5288");
+builder.Services.ConfigureHttpJsonOptions(options =>
+{
+    options.SerializerOptions.PropertyNamingPolicy = System.Text.Json.JsonNamingPolicy.CamelCase;
+});
+builder.Services.AddSingleton<AgentRuntime>();
+
+WebApplication app = builder.Build();
+app.UseDefaultFiles();
+app.UseStaticFiles();
+
+app.MapGet("/api/catalog", (AgentRuntime runtime) =>
+{
+    var snapshot = runtime.Catalog.Load();
+    return new
+    {
+        pluginsRoot = snapshot.PluginsRoot,
+        system = snapshot.System,
+        plugins = snapshot.Plugins,
+        nodes = snapshot.Nodes,
+        issues = snapshot.Issues,
+    };
+});
+app.MapGet("/api/credentials", (AgentRuntime runtime) => runtime.Credentials.ListPublic());
+app.MapGet("/api/status", (AgentRuntime runtime) => new
+{
+    weatherProvider = runtime.WeatherProvider,
+    pluginsRoot = runtime.PluginsRoot,
+});
+app.MapPost("/api/run", (WorkflowGraph graph, AgentRuntime runtime, CancellationToken cancellationToken)
+    => runtime.Runner.RunAsync(graph, cancellationToken));
+app.MapGet("/api/run/{runId}", (string runId, AgentRuntime runtime) =>
+{
+    WorkflowRunResult? result = runtime.Runner.Get(runId);
+    return result is null
+        ? Results.NotFound(new WorkflowRunResult { Ok = false, Status = WorkflowRunStatus.Failed, Error = "找不到这次运行。" })
+        : Results.Ok(result);
+});
+app.MapPost("/api/run/{runId}/decide", (string runId, DecisionAnswer answer, AgentRuntime runtime, CancellationToken cancellationToken)
+    => runtime.Runner.DecideAsync(runId, answer, cancellationToken));
+
+Console.WriteLine("可视化编排: http://127.0.0.1:5288");
+app.Run();